 <link rel="stylesheet" href="./tab选项卡.css">
 <!-- Tab选项卡1 -->
 <div class="box box1">
    <!-- 标题 -->
    <ul>
        <li class="active">1</li>
        <li>2</li>
        <li>3</li>
    </ul>
    <!-- 内容 -->
    <ol>
        <li class="active">1</li>
        <li>2</li>
        <li>3</li>
    </ol>
</div>

<!-- Tab选项卡2 -->
<div class="box box2">
    <!-- 标题 -->
    <ul>
        <li class="active">1</li>
        <li>2</li>
        <li>3</li>
    </ul>
    <!-- 内容 -->
    <ol>
        <li class="active">1</li>
        <li>2</li>
        <li>3</li>
    </ol>
</div>

<script src="./tab选项卡.js"></script>
<script>
    let tab1 = new Tab('.box1')
    let tab2 = new Tab('.box2')
</script>